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| Titel |
Impact of anthropomorphic soil genesis on hydraulic properties: the case of cranberry production |
| VerfasserIn |
Yann Périard, Silvio José Gumiere, Alain N. Rousseau, Jean Caron, Dennis W. Hallema |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250093421
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| Publikation (Nr.) |
 EGU/EGU2014-8120.pdf |
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| Zusammenfassung |
| The construction of a cranberry field requires the installation of a drainage system which
causes anthropic layering of the natural sequence of soil strata. Over the years, the soil
hydraulic properties may change under the influence of irrigation and water table
control. In fact, natural consolidation (drainage and recharge cycles), filtration and
clogging soil pores by colloidal particle accelerated by water management will alter the
hydrodynamic behavior of the soil (Gaillard et al., 2007; Wildenschild and Sheppard, 2013;
Bodner et al., 2013). Today, advances in the field of tomography imagery allows
the study a number of physicals processes of soils (Wildenschilds and Sheppard,
2013) especially for the transport of colloidal particles (Gaillard et al., 2007) and
consolidation (Reed et al, 2006; Pires et al, 2007). Therefore, the main objective of this
work is to analyze the temporal evolution of hydrodynamic properties of a sandy
soil during repeated drainage and recharge cycles using a medical CT-scan. A soil
columns laboratory experiment was setup in fall 2013, pressure head, input and
output flow, tracer monitoring (KBr and ZrO2) and tomographic analyses have
been used to quantify the temporal variation of the soil hydrodynamic properties of
these soil columns. The results showed that the water management (irrigation and
drainage) has strong effect on soil genesis and causes significant alteration of soil
hydraulic properties, which may reduce soil drainage capacity. Knowledge about the
mechanisms responsible of anthropic cranberry soil genesis will allow us to predict soil
evolution according to several conditions (soil type, drainage system design, water
management) to better anticipate and control their future negative effects on cranberry
production.
References:
Bodner, G., P. Scholl and H.P. Kaul. 2013. Field quantification of wetting–drying cycles
to predict temporal changes of soil pore size distribution. Soil and Tillage Research 133: 1-9.
doi:http://dx.doi.org/10.1016/j.still.2013.05.006.
Gaillard, J.-F., C. Chen, S.H. Stonedahl, B.L.T. Lau, D.T. Keane and A.I. Packman.
2007. Imaging of colloidal deposits in granular porous media by X-ray difference
micro-tomography. Geophysical Research Letters 34: L18404. doi:10.1029/2007GL030514.
Pires, L.F., O.O.S. Bacchi and K. Reichardt. 2007. Assessment of soil structure repair due
to wetting and drying cycles through 2D tomographic image analysis. Soil and Tillage
Research 94: 537-545. doi:http://dx.doi.org/10.1016/j.still.2006.10.008.
Reed, A. H., Thompson, K. E., Zhang, W., Willson, C. S., & Briggs, K. B.
(2006). Quantifying consolidation and reordering in natural granular media from
computed tomography images. Advances in X-ray Tomography for Geomaterials,
263-268.
Wildenschild, D. and A.P. Sheppard. 2013. X-ray imaging and analysis techniques for
quantifying pore-scale structure and processes in subsurface porous medium systems. Advances
in Water Resources 51: 217-246. doi:http://dx.doi.org/10.1016/j.advwatres.2012.07.018. |
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